221794810379519 has 8 divisors (see below), whose sum is σ = 238856095040640. Its totient is φ = 204733546490016.

The previous prime is 221794810379507. The next prime is 221794810379521. The reversal of 221794810379519 is 915973018497122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221794810379519 - 2²⁰ = 221794809330943 is a prime.

It is a super-2 number, since 2×221794810379519² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221794810376519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22423634 + ... + 30763760.

It is an arithmetic number, because the mean of its divisors is an integer number (29857011880080).

Almost surely, 2^{221794810379519} is an apocalyptic number.

221794810379519 is a deficient number, since it is larger than the sum of its proper divisors (17061284661121).

221794810379519 is a wasteful number, since it uses less digits than its factorization.

221794810379519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10385809.

The product of its (nonzero) digits is 68584320, while the sum is 68.

The spelling of 221794810379519 in words is "two hundred twenty-one trillion, seven hundred ninety-four billion, eight hundred ten million, three hundred seventy-nine thousand, five hundred nineteen".